Commercial Grout Cleaning in Markham
Grout cleaning is the extraction of soil from the porous cement joints between floor tiles, followed by sealing to slow reabsorption. Markham Hood Cleaning uses hot-water extraction with a joint-specific tool rather than surface scrubbing, because grout sits below the tile plane and holds soil a floor machine passes straight over. Cleaning grout without sealing it afterwards simply resets a clock that starts running again the same week.
Why grout darkens when the tile beside it does not
Cementitious grout is porous by nature. Under a microscope it is a network of capillaries, and capillaries draw liquid in. Set a greasy, pigmented liquid on a tiled floor and the tile, which is fired and effectively non-absorbent, sheds it, while the joint beside it pulls it below the surface. That is why a kitchen floor develops a grid of dark lines while the tiles themselves still look serviceable.
The geometry compounds it. Grout joints sit slightly lower than the tile faces, so a floor machine's pad or brush bridges from tile to tile and touches the joint lightly or not at all. Whatever the machine loosens then runs into the joints and is drawn in. A floor can be cleaned repeatedly and have its grout get steadily worse.
Nothing about that is cosmetic only. A porous joint holding grease and organic soil is a joint holding a food source, and a health inspector reads dark grout as a maintenance signal about the whole kitchen. It is one of the first things noticed, precisely because it is a visible record of what routine cleaning has been reaching.
Cleaning alone vs cleaning and sealing
The second line item is the one that decides how long the first one lasts.
| Consideration | Cleaned only | Cleaned and sealed |
|---|---|---|
| Appearance on the day | The same. Both look restored. | The same. The difference is invisible at first. |
| Absorption afterwards | Open capillaries, and cleaning has opened them further. | Sealer occupies the pore structure and resists liquid entering. |
| How long it holds | Weeks in a working kitchen. | Substantially longer, with routine cleaning working better in between. |
| Daily mopping | Drives soil back into open joints. | Soil stays on the surface where a mop can lift it. |
| Cost over three years | Repeated deep cleans. | One clean, one seal, then far longer intervals. |
Sealing is quoted as its own line so it can be approved separately, but skipping it usually costs more within a year.
When grout cannot be restored
Not every joint comes back, and saying so before the work is the honest position.
Joints that have eroded below the tile edge. Where grout has worn or washed out so the tile edges stand proud, the problem is missing material rather than dirty material. Cleaning removes what little remains. The answer is regrouting, which is a tiling job.
Cracked or hollow joints. Tapping along a joint that sounds hollow indicates the bond beneath has failed, often from movement or water travelling under the tile. Extraction pushes water into that void and makes it worse, so those areas are identified first and worked around or left for a tiler.
Permanent staining. Some dyes and long-term contact with certain oils bond chemically with cement. The joint is clean and still discoloured. Colour sealing, which pigments and seals in one product, is the option there, and it is offered as a choice rather than presented as cleaning.
Epoxy grout. Newer commercial kitchens are often built with epoxy grout, which is not porous and does not stain the way cement does. If it looks dirty, the soil is sitting on top of it and a normal floor clean will lift it. Sealing an epoxy joint achieves nothing and is not quoted. That is picked up at the assessment, alongside the floor itself, which is covered on the kitchen floor cleaning page.
How much does grout cleaning cost in Markham in 2026?
Markham Hood Cleaning prices grout cleaning by tiled area and joint condition after a free assessment, with sealing quoted as a separate line so it can be approved on its own.
Joint width and tile size drive the labour as much as floor area does. A floor of small tiles has far more linear metres of joint per square metre than a floor of large ones, so two rooms of identical size can price very differently. Condition then decides whether one pass is enough or two are needed.
It is almost always booked with the floor clean, because the floor has to be clean before the joints can be worked and because the same overnight window covers both. Booking grout on its own means paying for a visit that has to start with a floor clean anyway.
Next step: call 289-806-9117 or request a written quote. A close photograph of a joint, taken from about a foot away, is usually enough to tell cement from epoxy.
Grout cleaning in Markham: frequently asked questions
Will bleach clean grout?
Bleach lightens the colour of what is in the joint without removing it, so the joint looks better and still holds the same soil. Used repeatedly it also degrades cementitious grout, weakening it and making it more absorbent than before. The result is a joint that looks acceptable, holds more, and fails sooner.
How long does sealer last in a commercial kitchen?
Less time than on a domestic floor, because commercial kitchens combine heat, grease, standing water and heavy traffic. Reapplication is normally part of a periodic deep-clean cycle rather than a once-and-done job. The assessment gives a realistic expectation for the specific floor rather than repeating a figure off a product label.
Is sealed grout still slip resistant?
A penetrating sealer soaks into the pore structure rather than forming a film on top, so it does not create a slippery surface. Topical coatings that sit on the surface are a different product and are not appropriate on a kitchen floor for exactly that reason. Grip comes from the tile texture, which is discussed on the floor cleaning page.
Can grout be recoloured rather than cleaned?
Colour sealing pigments and seals the joint in one step, and it is a legitimate answer for permanently stained grout that is structurally sound. It is offered as a choice with the trade-offs explained, not sold as a cleaning result. Grout that is eroded or hollow needs a tiler before any of this applies.
How long before the kitchen can use the floor?
Extraction leaves the floor damp and it needs to dry before sealer goes on, and the sealer then needs its own cure time before traffic. In practice that means an overnight visit and a handover in the morning, with the timing confirmed when the visit is booked so nobody plans an early prep shift around a wet floor.